Improvement in heating-stoves



2 Sheets--Sheet 1.

Stoves.

Heating'- Fm n WITNESSES .4

` ZSheets--Sheet l. JUHNSON. -H'ealing-Snves.

Patented Oct. 28, 1873.

WITN Essss UNITED STATES PATENT OEEIOE.l

JOSEPH JOHNSON, OF HARRISBURG, PENNSYLVANIA.

IMPROVEMENT IN HEATING-STOVES.

Specification forming part of Letters Patent N0- 144,105, dated October28, 1873 5 application led October 26, 1871. l

To all whom it may concern:

Be it known that I, J OsErn JOHNSON, of Harrisburg, Dauphin county,Pennsylvania, have invented an Improvement in-Heating` Stoves, of whichthe following' is a speciiication:

My invention relates to an improvement in stoves which supply heated airto rooms above that in which the stove is situated; and my improvementconsists in combining, with the casing of the stove, a permanentchamber,

in which the airis heated prior to being conducted to the upper rooms.

Figure 1, Drawing No. 1, is avertical section of sufficient ofthe stoveto illustrate my improvement; Fig. 2, a vertical section on the line l2, Fig. l; and Fig. 3, a vertical section on the line 3 4, Fig. l Fig.4, Drawing No.2, also a sectional plan on the line 3 4, Fig. l; and Fig.5, a sectional plan on the line 5 6, Fig. l.

A is a ring situated on the lower portion of the fire-chamber of aheating-stove, and between this ring and an upper ring, B, extends thesloping casing D of the upper portion of the hre-chamber, there being in'this casing a p number of openings, a a, furnished with mica panels inthe usual manner. Surrounding the ring `B, and forming part of the samein the present instance, is an outer ring, b, the two rings beingconnected together by radial bars az, Fig. 5, between which the heatedair from below can pass freely. At the rear of the casing D is formed apermanent heating-chamber, E, the citent and shape of which will be bestobserved in Figs. 2 and 3, cold air being admitted to this chamber belowthrough openin gs d d, and passing from the same, in a heated state,through the ring B b, to the annular space G between the two casings eand f, which are iitted to iianges on the said rings B b, the space Gcommunicating with the rooms above that in which the stove is situated,and the products of combustion passing through the space surrounded bythe casing e vto the usual exit-pipe. (Not shown in the drawing.) Iwosegmental plates, II and H', are arranged to slide in.

grooves in the lower ring A and upper ring b, each slide being furnishedat its front edge with a flange, h, bearing against the casing D, and,with the rear of the permanent heatingchamber E, maintaining the slidesat such a distance from the said casing D as to form be tween the two,when the slides are moved forward, as in Fig. 2, two heating-chambers, Iand I', which communicate, through the ring B b,

with the annular space G, and receive coldair through openings i below.

AWhen these slides are moved bach to the rear of the permanentheating-chamber E, as

shown in Fig. 4, the room containing the stove has the full benefit ofthe radial heat from the whole of the casing D, excepting that portionof the rear of the same which is occupied by the said permanent chamber.

` When it is desirable to have more heat in the upper chamber and lessin the room below, the slides I and I may be moved forwardiuntilarrested by the flanges m m of the casing D, when two supplementaryheating-chambers,

I and I', will be formed, these chambers communicating, through theannular space G, with the rooms above. f

I claiml. rPhe combination, with the casing of 4the stove and with thespace G,.of the heatingchamber E, arranged as set forth.

2. The combination of the casing D, the pery manent heating-chamber E,the slides Hand. H', and the annular space Gr communicating with theupper rooms.

3. The combination, with the casing of the stove, of slides H H', havinginner iianges It, and adjustable to form chambers of varying extent, asset forth.

In testimony whereof I have signed my name to this speciiication in thepresence of two subscribing witnesses.

JOSEPH JOHNSON.

Witnesses I l JOHN H. ZOLLINGER, GEORGE GEAEHART.

